高电压技术2024，Vol.50Issue(11)：4951-4960,10.DOI:10.13336/j.1003-6520.hve.20231537
铜蒸气对密封直流接触器氢-氮混合气体电弧特性的影响
Effect of Copper Vapour on the Arc Characteristics of Hydrogen-nitrogen Gas Mixtures in Sealed DC Contactors
摘要
Abstract
The copper vapor generated by the arc ablation contact during the opening process of sealed DC contactors plays an important role in the arc characteristics and opening performance of the hydrogen-nitrogen gas mixture.In this paper,the physical parameters of the hydrogen-nitrogen gas mixture with different percentages of copper vapor are calcu-lated based on the equilibrium plasma theory,and the influence of copper vapor is introduced to establish an arc model of hydrogen-nitrogen gas mixture based on the magnetohydrodynamic theory,and the influence laws of the copper vapor percentage and distribution law in the gas mixture on the arc ignition characteristics and arc development and evolution characteristics are systematically studied.Based on the disassembled cavity,simulated experiments were carried out to verify the arc re-strike probability and arc extinguishing time in the 750 V/250 A sealed DC contactor experiments,which are basically consistent with the theoretical analysis results.The study shows that,as the proportion of copper vapor in the gas mixture increases,the arc temperature decreases slowly,the arc extinguishing time increases gradually,and the proba-bility of heavy breakdown increases;meanwhile,the uneven distribution of copper vapor decreases compared with the uniform distribution of arc extinguishing time.The results of the study provide theoretical reference for the optimization design of DC arc burning characteristics of mixed gas and highly reliable sealed DC contactors.关键词
密封直流接触器/铜蒸气/氢-氮混合气体/电弧/燃弧特性Key words
sealed DC contactors/copper vapor/hydrogen-nitrogen gas mixture/arc/burning arc characteristics引用本文复制引用
程显,张钰峥,葛国伟,秦聪,陈鸿源..铜蒸气对密封直流接触器氢-氮混合气体电弧特性的影响[J].高电压技术,2024,50(11):4951-4960,10.基金项目
国家高层次人才特殊支持计划(SO20220B06966) （SO20220B06966）
国家自然科学基金(52477162 （）
52477163 （）
52107170) （）
河南省高等教育教学改革研究与实践项目(2023SJGLX141Y) （2023SJGLX141Y）
郑州大学教育教学改革研究与实践项目(2023ZZUJGXM060).Project supported by National Special Support Program for High-level Talents(SQ20220B06966),National Natural Science Foundations of China(52477162,52477163,52107170),Research and Practice Project of Higher Education Teaching Reform in Henan Province(2023SJGLX141Y),Research and Practice Project of Education and Teaching Reform of Zhengzhou University(2023ZZUJGXM060). （2023ZZUJGXM060）
